Update idletimer.cpp

Make it work without global variable initialization. This is due to golang/go#10023 (duplicate of golang/go#4069) and solves go-qml#142.

Author: neclepsio

cpp/idletimer.cpp

@@ -12,7 +12,7 @@ class IdleTimer : public QObject
     public:
 
     static IdleTimer *singleton() {
-		if (_singleton == nullptr) _singleton = new IdleTimer;
+		    if (_singleton == nullptr) _singleton = new IdleTimer;
         return _singleton;
     }
 
@@ -38,12 +38,13 @@ class IdleTimer : public QObject
         }
     }
 
-	static IdleTimer* _singleton;
+  	static IdleTimer* _singleton;
+
     private:
 
     int32_t *guiIdleRun;
 
-    QBasicTimer timer;    
+    QBasicTimer timer;
 };
 
 IdleTimer* IdleTimer::_singleton;